Mineral fertilizer.



UNITED STATES PATENT or non.

JOHN ADOLPH WENDEL, OF- MILWAUKEE, WISCONSIN.

man. FERTILIZER.

Specification of Letterl Patent.

Patented we so, 1908.

Application filed. October 2, 1907. lerl'al No. 895,561.

To all whom it may concern: I

Be it known that 1, JOHN ADoLPH WEN- DEL, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Mineral Ferti- Magnesium sulfate lizers, of which the following is a specification.

Tlns lnventlon is an improved mineral fertihzer, as hereinafter described.

. My improved mineral fertilizer consists Primary rock, (porphyry, granite, or gnelss) Dolomite .lhosphorito Sodium sulfate oxsiccatpd Calcium sulfate. Ferrous sulfate.

103 parts 10 2 Calcium carbonate Silicic acid or silicious earth. Kainit to 5 to In preparing my improved fertilizer, the rocks are burned in an oven, after which they are at once cooled off in cold water and finally crushed in a mill. The other ingredients which have also been previously comminuted are now added to the burned and owdered rock and intimatelymixed therewith. The fertilizer is then placed in bags or other suitable receptacles and' may be stored indefinitely in a dry iplace until it is to be used.

In practice, om 500 to 600 pounds of my improved fertilizer are required per acre.

The fertilizer should be spread u on the land 7 I in autumn and well lowed into t e soil.

My improved fertilizer is suitable for every description of soil, plant and fruit but roduces the best results when used on and which is used for different crops in rotation,

as for instance, barley, first year, rye, second year, oats third year, potatoes fourth year and turnips fifth year. The ingredients may be varied in proportion within the scope of my invention.

My improved fertilizer is not only valuable for use as such but is also valuable in rotecting crops from injury by worms an insects.

Having thus described my invention, what 1. The herein described fertilizer consistin of burned and comminuted primary rock, do omite phosphorite, sodium sulfate exslccated, calcium sulfate, ferrous sulfate, mag- JOHN ADOLPH WENDEL.

Witnesses:

LOUIS BLUM, Rosa WOLLER. 

